I sold my stock D30 with 3.73 gears for $400. So yours is probably worth an extra $100. Took me a few months to sell my D30, there weren't many that contacted me. The guy that bought it cracked his and needed on right away.
For the rear, maybe $600 or so. Not much demand for a Sport D44 rear. They don't break much, so probably hard to find a buyer.
Might get some cash if you can pull the gears out. Those are worth more than any of the other parts since 5.13 are popular, though not very popular for a D30.